Differences

This shows you the differences between two versions of the page.


Previous revision
—memshift [2026/08/22 13:11] (current) – neils
Line 1: Line 1:
 +====== MEMSHIFT ======
 +
 +[pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65]
 +===== Syntax =====
 +
 +  MEMSHIFT <source_address>, <destination_address>, <length>
 +  
 +The ''MEMSHIFT'' command calls a built-in routine that copies //length// number bytes in memory from //source_address// to //destination_address//.
 +
 +<adm note>
 +''MEMSHIFT'' uses fast Direct Memory Access (DMA) on the [m65].
 +</adm>
 +
 +The routine is overlapping-safe **upwards only**.
 +
 +{{ :v2::memshift.png?direct&600 |}}
 +
 +Use it if
 +
 +  * The source and destination ranges don't overlap, or
 +  * The destination range is higher in memory
 +
 +For copying overlapping areas downwards, see ''[[memcpy|MEMCPY]]''.
 +
 +===== See also =====
 +
 +  * [[MEMSET]]
 +  * [[MEMCPY]]